Oil & Gas

SealWelding™

FPSO In-Situ SealWelding™

Revolutionary SealWelding™ technology from Trelleborg Sealing Solutions allows seals to be welded in-situ on an FPSO platform, eliminating the need for the vessel to disconnect and return to shore.

Utilizing Trelleborg’s well-established seal materials, our technology can massively reduce the downtime and associated costs that come from maintaining an FPSO swivel stack. Currently, swivel stack maintenance requires a vessel to travel back to shore so that components can be completely disassembled and seals replaced. Through optimized billet welding, Trelleborg’s SealWelding™ technology means a replacement seal can be welded in-situ in approved materials.

Offshore, on board the FPSO, the seal is unpacked and installed onto the swivel by personnel from Trelleborg’s service team; our skilled engineers install it in the Weld Head Enclosure (part of the welding system) which, certified to ATEX zone 1, is then pressurized so that the welding can take place. Fully enclosed, production on other swivel stacks can continue without risk.

Intervention required following end of swivel stack seal service life

The original seal is removed on-site and a new split Turcon® Variseal® is inserted inside the swivel.